Collaborative learning:
Strategies: which one(s) are the more/most effective strategies for different groups, such as students who intend to learn vs. educators who intend to teach?
An article that might be useful: Using computer supported collaborative learning strategies for helping students acquire self-regulated problem-solving skills in mathematics
Also, the section of Strategies and the section of Types should well supplement each other if these two sections are placed in proximity.
Is the section of Impact slightly overlapping the section of Strategies?
The General tips, Design, Managing and Evaluation of Collaborative learning group can all be grouped under the section of Collaborative learning group. It may be helpful then, to create a subpage for Collaborative learning group , but I do not think it is mandatory.
Guanxi:
The difference between nepotism/cronyism and Guanxi can be made more explicit as long as such difference is relevant to the article. The earliest mention of similarities and differences of the two sets of concept(s) was in 2012, as indicated by the Talk page. From then on, there might be more extensive analysis on such comparison, which could be useful addition to the article. Such addition may not fall under the section of Usage examples, but more like an extended section of Disambiguation, or an supplementation to the existing section of Western vs. Eastern social business relations.
The introduction paragraph made a good attempt to include a brief history and background of Guanxi. This background could be put into a separate section, but it is in good shape now.
The section Guanxi in a business context is a good addition, more comprehensive and thus more objective than the previous version. It also makes the first move differentiating nepotism/cronyism and Guanxi (as nepotism/cronyism usually happens in business context, while Guanxi tends to exist ubiquitously in Chinese cultural environment).